Lifting device and propelling equipment

Abstract

The utility model provides a lifting device and propelling equipment, and relates to the technical field of marine propelling. The lifting device comprises a first shaft, a second shaft and a transmission mechanism connected with the first shaft and the second shaft. The transmission mechanism is configured to enable the second shaft to rotate synchronously with the first shaft. The traction component is wound on the first shaft and the second shaft; wherein one of the first shaft and the second shaft is a driving shaft, and the other one of the first shaft and the second shaft is a driven shaft.

Description

Technical Field

[0001] This specification relates to the technical field of marine propulsion, and particularly to a lifting device and a propulsion device. Background Art

[0002] Due to its characteristics of large lifting weight and labor saving, automatic lifting devices are widely used in various fields. Existing lifting devices often use hydraulic mechanisms or gear transmission mechanisms to achieve the lifting and lowering of objects; however, hydraulic devices require the setting of various equipment such as hydraulic cylinders. This type of lifting device has a complex structure, a large number of devices, a high setting cost, and greatly occupies the use space, making it difficult to be put into use in some positions with limited space.

[0003] A propulsion device, also known as an electric thruster, a top current machine or an electric anchor, is a device installed on a hull to provide power and steering for the hull. Generally, it is driven by electricity, and its low noise and environmental friendliness are welcomed by more and more ship users. In some application scenarios, the propulsion device can help the ship move forward on the water, and in some other application scenarios, the propulsion device can help the ship berth on the water. The propulsion device includes a thruster, and the thruster is the power source required for the ship to move forward or berth, and generally includes a propeller and a power unit (such as an electric motor, a motor, etc.). Summary of the Utility Model

[0004] One or more embodiments of this specification provide a lifting device, including: a first shaft, a second shaft, and a transmission mechanism connecting the first shaft and the second shaft, the transmission mechanism being configured to synchronize the rotation of the second shaft with the first shaft; a traction member, the traction member being wound around the first shaft and the second shaft, the traction member being configured to lift or lower a towed member based on the rotation of the first shaft and the second shaft; wherein, one of the first shaft and the second shaft is a driving shaft, and the other of the first shaft and the second shaft is a driven shaft.

[0005] According to the lifting device of some embodiments of this specification, the transmission mechanism includes: a first gear fixedly connected to the first shaft, a second gear fixedly connected to the second shaft, and one or more transmission gears respectively meshing with the first gear and the second gear; the rotation directions of the first shaft and the second shaft are the same.

[0006] According to the lifting device of some embodiments of this specification, the transmission mechanism includes one transmission gear: the transmission mechanism further includes: a transmission shaft fixedly arranged, the transmission gear being rotatably connected to the transmission shaft; gaskets arranged on one side or both sides of the transmission gear; a connecting sleeve arranged between the transmission gear and the transmission shaft.

[0007] According to the lifting device described in some embodiments of this specification, the second shaft is located above the first shaft; the traction member passes from bottom to top through the first side of the first shaft and wraps around to the first side of the second shaft, then extends downward from the second side of the second shaft and wraps around to the second side of the first shaft, and then extends upward from the first side of the first shaft and wraps around to the first side of the second shaft; wherein, the first side is one of the opposite two sides of the lifting device, and the second side is the other of the opposite two sides of the lifting device.

[0008] According to the lifting device described in some embodiments of this specification, the first shaft and the first gear, and the second shaft and the second gear are connected by key drive, and the first shaft and the first gear, and the second shaft and the second gear are fixedly connected by fasteners arranged in the radial direction; alternatively, the first shaft and the first gear are integrally formed, and the second shaft and the second gear are integrally formed.

[0009] According to the lifting device described in some embodiments of this specification, a transmission mechanism is provided at each end of the first shaft and the second shaft.

[0010] According to the lifting device described in some embodiments of this specification, a plurality of first grooves for the traction member to wrap around are provided on the first shaft, and a plurality of second grooves for the traction member to wrap around are provided on the second shaft; both the first grooves and the second grooves are arc-shaped.

[0011] According to the lifting device described in some embodiments of this specification, a separating portion is provided on the first shaft and the second shaft, and the separating portion is provided between two adjacent first grooves and between two adjacent second grooves; the outer diameter of the separating portion of the first shaft is smaller than the outer diameter of the first shaft, and the outer diameter of the separating portion of the second shaft is smaller than the outer diameter of the second shaft.

[0012] According to the lifting device described in some embodiments of this specification, the transmission mechanism includes: a first gear fixedly connected to the first shaft, a second gear fixedly connected to the second shaft, and the first gear meshes with the second gear; the rotation directions of the first shaft and the second shaft are opposite.

[0013] The lifting device according to some embodiments of the present specification, wherein the second shaft is located above the first shaft; the traction member passes upwardly through the first side of the first shaft and wraps around the first side of the second shaft, then extends downwardly from the second side of the second shaft and wraps around the first side of the first shaft, and then extends upwardly from the second side of the first shaft and wraps around the first side of the second shaft; wherein, the first side is one of the opposite sides of the lifting device, and the second side is the other of the opposite sides of the lifting device.

[0014] The lifting device according to some embodiments of the present specification, wherein a first groove for the traction member to wrap around is formed on the first shaft, and a plurality of second grooves for the traction member to wrap around are formed on the second shaft; the total width of the plurality of second grooves in the axial direction of the second shaft matches the width of the first groove in the axial direction of the first shaft.

[0015] The lifting device according to some embodiments of the present specification includes: a housing, the housing has two vertically arranged side plates, and the first shaft and the second shaft are located between the two side plates; bearings are provided between the first shaft and the side plates and between the second shaft and the side plates; a first oil seal is provided at the bearing of the first shaft, and / or a second oil seal is provided at the bearing of the second shaft.

[0016] The lifting device according to some embodiments of the present specification further includes: an oil seal cover, the oil seal cover is fixedly connected to the side plate, and the oil seal cover has: a first hole for the first shaft to pass through, a first groove for accommodating the first oil seal, a second hole for the second shaft to pass through, a second groove for accommodating the second oil seal, and a sealing strip groove at least surrounding the outside of the first groove and the second groove; wherein, a sealing strip for fitting with the side plate is provided in the sealing strip groove; the bearing protrudes from the side plate, and the oil seal cover covers the first oil seal, the second oil seal, and partially covers the bearing.

[0017] The lifting device according to some embodiments of the present specification, wherein the traction member includes a cable, the member to be towed includes a lifting rod, the middle of the cable is wound around the first shaft and the second shaft, and both ends of the cable are fixedly connected to both ends of the lifting rod.

[0018] One or more embodiments of the present specification provide a propulsion device, which includes the lifting device described in any one of the above, wherein the lifting device raises or lowers a lifting rod through the traction member, and a thruster is provided on the lifting rod. Description of the Drawings

[0019] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote the same structures or steps.

[0020] Figure 1 is a perspective view of the lifting device shown in the first embodiment of this specification.

[0021] Figure 2 is a schematic diagram of the first shaft and the second shaft of the lifting device shown in the first embodiment of this specification.

[0022] Figure 3 is Figure 2 a partial enlarged schematic diagram.

[0023] Figure 4 is a front view of the first shaft and the second shaft of the lifting device shown in the first embodiment of this specification.

[0024] Figure 5 is a side sectional view schematic diagram of the lifting device shown in the first embodiment of this specification.

[0025] Figure 6 is a schematic diagram of the first shaft, the second shaft and the oil seal of the lifting device shown in the first embodiment of this specification.

[0026] Figure 7 is a schematic diagram of the related structure of the transmission gear of the lifting device shown in the first embodiment of this specification.

[0027] Figure 8 is a front view of the related structure of the transmission gear of the lifting device shown in the first embodiment of this specification.

[0028] Figure 9 is a sectional view of the related structure of the transmission gear of the lifting device shown in the first embodiment of this specification.

[0029] Figure 10 is a perspective view of the second shaft of the lifting device shown in the first embodiment of this specification.

[0030] Figure 11 is an assembly schematic diagram of the oil seal cover of the lifting device shown in the first embodiment of this specification.

[0031] Figure 12 is a sectional view schematic diagram of the oil seal cover of the lifting device shown in the first embodiment of this specification.

[0032] Figure 13 is a perspective schematic diagram of the oil seal cover of the lifting device shown in the first embodiment of this specification.

[0033] Figure 14, Figure 15 is a perspective view of the lifting device shown in the second embodiment of this specification.

[0034] Figure 16 is Figure 15 a partially enlarged schematic view.

[0035] Figure 17 is a winding schematic view of the traction member of the lifting device shown in the second embodiment of this specification.

[0036] Figure 18 is a front view schematic view of the first shaft and the second shaft shown in the second embodiment of this specification.

[0037] Figure 19 is a sectional view schematic view of the first shaft and the second shaft shown in the second embodiment of this specification.

[0038] Figure 20 is Figure 19 a partially enlarged schematic view.

[0039] Figure 21 , Figure 22 is a perspective view schematic view of the first shaft and the second shaft shown in the second embodiment of this specification.

[0040] Figure 23 is a schematic view of the first gear and the second gear shown in the second embodiment of this specification.

[0041] Figure 24 is a schematic view of the side plate shown in the second embodiment of this specification.

[0042] Figure 25 is a schematic view of the side plate, bearing and oil seal shown in the second embodiment of this specification.

[0043] Figure 26 is a side view schematic view of the side plate, bearing and oil seal shown in the second embodiment of this specification.

[0044] Figure 27 is a perspective view of the lifting device shown in the third embodiment of this specification.

[0045] Figure 28 is Figure 27 a partially enlarged schematic view.

[0046] Figure 29 is a winding schematic view of the traction member of the lifting device shown in the third embodiment of this specification.

[0047] Figure 30 , Figure 31 is a schematic view of the lifting device shown in the fourth embodiment of this specification.

[0048] Figure 32 , Figure 33 is a schematic diagram of the lifting device shown in the fifth embodiment of this specification.

[0049] Figure 34 is a schematic cross-sectional view at the first shaft and the second shaft of the lifting device shown in the fifth embodiment of this specification.

[0050] Figure 35 is a schematic cross-sectional view at the transmission shaft of the lifting device shown in the fifth embodiment of this specification.

[0051] Reference numerals in the figure: 1 first shaft; 11 first groove; 2 second shaft; 21 second groove; 3 traction member; 41 first gear; 42 second gear; 43 transmission gear; 44 transmission shaft; 45 gasket; 46 connecting sleeve; 51 first section; 52 second section; 53 third section; 54 fourth section; 6 side plate; 7 bearing; 81 first oil seal; 82 second oil seal; 83 oil seal cover; 831 first hole; 832 first groove; 833 second hole; 834 second groove; 835 sealing strip groove; 836 third hole; 9 sealing strip; 101 inner ring portion; 102 outer ring portion; 103 connecting portion; 111 shaft keyway; 112 gear keyway; 113 key; 114 gear fixing hole; A first side; B second side; 100 lifting rod; 200 thruster; 300 control mechanism; 400 separating portion. Detailed implementation manners

[0052] To more clearly illustrate the technical solutions of the embodiments of this specification, the embodiments will be introduced in detail below with reference to the accompanying drawings. Obviously, the content described below is some examples or embodiments of this specification. For those of ordinary skill in the art, without creative efforts, the technical solutions or means disclosed in this specification can also be applied to other scenarios according to these technical contents.

[0053] Unless otherwise specified, the technical terms describing components, elements, etc. in this specification do not specifically refer to the singular number and may also include the plural. Generally speaking, terms such as "including" and "comprising" only indicate the inclusion of the clearly identified steps, elements or components, and these steps, elements and components do not constitute an exclusive list. For example, the described method or device may also include other steps or components.

[0054] It should be noted that the embodiments provided in this specification, such as the first embodiment, the second embodiment, the third embodiment, etc., can be combined according to actual needs to obtain more embodiments without contradiction.

[0055] In some embodiments of this specification, a marine propulsion device mainly includes a propeller, a power unit for driving the propeller, and a rod structure connected to the power unit. The rod structure allows the propeller to descend and enter the water surface, or adjust its depth underwater, and also allows the propeller to rise and leave the water surface. In some embodiments, the rod structure is also configured to be able to change from a vertical state to a horizontal state, so as to allow the marine propulsion device to be stored horizontally or substantially horizontally inside the hull. In some embodiments, a traction lifting device can be used to drive the rod structure (such as a lifting rod) to rise or fall, thereby realizing the propeller descending into the water surface or rising out of the water surface.

[0056] In some embodiments, the traction lifting device drives a rotating shaft to rotate through a motor, so as to drive a traction member (such as a steel cable) wound annularly around the rotating shaft and a driven shaft to rise or fall relative to the rotating shaft, thereby further driving the lifting rod connected to both ends of the traction member to rise or fall. Among them, the rotating shaft provides power to drive the movement of the traction member, and the traction member drives the driven shaft to follow. The rotating shaft and the traction member, and the traction member and the driven shaft are driven by friction.

[0057] The arrangement of the driven shaft at least provides the effect of enabling the traction member (such as a steel cable) to be tensioned, improving the friction between the traction member and the rotating shaft, but reducing the contact surface between the traction member and the rotating shaft. The reduced part of the contact surface between the traction member and the rotating shaft is supplemented by the contact between the traction member and the driven shaft. Overall, the arrangement of the driven shaft keeps the total contact surface of the traction member basically unchanged, while increasing the normal pressure exerted by the traction member on the rotating shaft, so the overall friction of the traction member is increased, and the transmission efficiency and reliability are improved.

[0058] However, since the driven shaft itself does not have power and its rotation is driven by the traction member, its rotation often is not synchronized with the rotating shaft, and there is a possibility of occasional slipping between the driven shaft and the traction member.

[0059] To reduce the slipping problem between the driven shaft and the traction member, the driven shaft is also configured to be able to provide power to the traction member, and at the same time, according to the working conditions of the traction member, the driven shaft rotates synchronously with the driving shaft, changing the transmission mode of "rotating shaft → traction member → driven shaft" to "rotating shaft → traction member, driven shaft → traction member", so as to further improve the transmission effect between the driven shaft and the traction member, which is a feasible option.

[0060] First Embodiment

[0061] In one or more embodiments provided in this specification, refer to Figure 1 、 Figure 2As shown, a lifting device is provided, which can achieve the transmission effect of "rotating shaft → traction member, driven shaft → traction member". Specifically, it includes: a first shaft 1, a second shaft 2, and a transmission mechanism connecting the first shaft 1 and the second shaft 2. The transmission mechanism is configured to make the second shaft 2 rotate synchronously with the first shaft 1. In some embodiments, the lifting device further includes: a traction member 3, which is wound around the first shaft 1 and the second shaft 2. The traction member 3 is configured to carry a traction member to rise or fall based on the rotation of the first shaft 1 and the second shaft 2. Among them, one of the first shaft 1 and the second shaft 2 is a driving shaft, and the other of the first shaft 1 and the second shaft 2 is a driven shaft.

[0062] For example, a motor is provided, which drives the first shaft 1 to rotate. The first shaft 1 drives the second shaft 2 to rotate through the transmission mechanism, so that both the first shaft 1 and the second shaft 2 provide power to the traction member 3. In this embodiment, the first shaft 1 is the driving shaft and the second shaft 2 is the driven shaft. For another example, a motor is provided, which drives the second shaft 2 to rotate. The second shaft 2 drives the first shaft 1 to rotate through the transmission mechanism, so that both the first shaft 1 and the second shaft 2 provide power to the traction member 3. In some embodiments, the motor can also be replaced by a manually driven rocker.

[0063] In some embodiments, the traction member 3 can be structures such as cables, ropes, belts, etc., for example, steel cables. In some embodiments, the equipment to be lifted is configured to be fixed on the steel cable. In some specific embodiments, the equipment to be lifted can be a rod, such as a lifting rod. The two ends of the steel cable are respectively connected to the lifting rod, and the steel cable is tensioned on the lifting rod, so as to drive the up and down movement of the lifting rod through the up and down movement of the steel cable to implement lifting.

[0064] In some embodiments, the transmission ratio of the transmission mechanism can be 1:1, so that the first shaft 1 and the second shaft 2 rotate synchronously. The first shaft 1 and the second shaft 2 can be solid shafts or hollow shafts.

[0065] Exemplarily, the traction member can be a structure or equipment fixed on the traction member 3. The traction member can be fixed in the middle or at one end of the traction member 3, and the two ends of the traction member can also be respectively fixed to the two ends of the traction member 3. For example, it includes a lifting rod, and the two ends of the lifting rod are respectively fixedly connected to the two ends of the traction member 3. Based on the rotation of the first shaft 1 and the second shaft 2, the traction member 3 is driven to rise or fall, and then the lifting rod is driven to rise or fall.

[0066] In one or more embodiments provided in this specification, refer to Figure 2 、 Figure 3As shown, the transmission mechanism may include: a first gear 41 fixedly connected to the first shaft 1, a second gear 42 fixedly connected to the second shaft 2, and one or more transmission gears 43 respectively meshing with the first gear 41 and the second gear 42. The one or more transmission gears 43 are configured to make the rotation directions of the first shaft 1 and the second shaft 2 the same.

[0067] See Figures 4 to 6 As shown, in some embodiments, the transmission mechanism may include one transmission gear 43. See Figures 7 to 9 As shown, the transmission mechanism may further include: a transmission shaft 44 fixedly arranged, the transmission gear 43 is rotatably connected to the transmission shaft 44, and the transmission gear 43 is configured to be able to rotate on the transmission shaft 44. Exemplarily, the transmission shaft 44 has a non-circular end, and the fixation of the transmission shaft 44 is achieved through the cooperation of the non-circular end of the transmission shaft 44 and the non-circular hole at the fixed position of the transmission shaft, preventing the rotation of the transmission shaft 44 itself. For example, Figure 7 in, the right end of the transmission shaft 44 is waist-shaped. In other embodiments, the right end of the transmission shaft 44 may also be rectangular, hexagonal, etc.

[0068] In some embodiments, the outer diameter of the first gear 41 is approximately equal to the maximum outer diameter of the first shaft 1, and the outer diameter of the second gear 42 is approximately equal to the maximum outer diameter of the second shaft 2 to create as much space as possible. In some embodiments, the transmission gear 43 is located on one side of the first gear 41 and the second gear 42 for space utilization.

[0069] Continue to see Figures 7 to 9 As shown, in some embodiments, the transmission mechanism may further include: gaskets 45 provided on one or both sides of the transmission gear 43, and a connecting sleeve 46 provided between the transmission gear 43 and the transmission shaft 44. In some embodiments, the transmission gear 43 may be annular, the transmission gear 43 is sleeved on the fixedly arranged transmission shaft 44, and the transmission gear 43 can freely rotate relative to the fixedly arranged transmission shaft 44, and the connecting sleeve 46 is arranged in a sleeve shape between the transmission gear 43 and the transmission shaft 44. For example, both the gaskets 45 and the connecting sleeve 46 are made of nylon material to reduce the frictional force between the transmission gear 43 and the surrounding structure, as well as the frictional force between the transmission gear 43 and the transmission shaft 44, so that the transmission gear 43 reduces power loss during power transmission, and the resistance that needs to be overcome when the first shaft 1 transmits power to the second shaft 2 is smaller, making it easier for the second shaft 2 to rotate synchronously with the first shaft, thereby further reducing the possibility of slipping between the traction member 3 and the first shaft 1 and the second shaft 2.

[0070] In one or more embodiments provided in this specification, the second shaft 2 is located above the first shaft 1. See Figure 2As shown, the traction member 3 can pass upward from the first side A of the first shaft 1 and wrap around to the first side A of the second shaft 2, then extend downward from the second side B of the second shaft 2 and wrap around to the second side B of the first shaft 1, and then extend upward from the first side A of the first shaft 1 and wrap around to the first side A of the second shaft 2.

[0071] Wherein, the first side A can be one of the opposite sides of the lifting device (such as the front and rear sides, or the left and right sides), and the second side B is the other of the opposite sides of the lifting device. Among them, refer to Figure 2 As shown, the first side A refers to Figure 2 the front side in Figure 2 and the second side B refers to

[0072] In this embodiment, the first shaft 1 and the second shaft 2 are configured to rotate in the same direction. Through the above winding method of the traction member 3, it is allowed that when the first shaft 1 and the second shaft 2 rotate in the same direction, the traction member 3 is guided to rise or fall.

[0073] In some embodiments, the second shaft 2 can be closer to the second side B relative to the first shaft 1. Refer to Figure 5 As shown, the relative positions of the first shaft 1 and the second shaft 2 in the front - rear direction Figure 5 It can be seen that there is a certain offset between the first shaft 1 and the second shaft 2 in the front - rear direction (that is, Figure 5 the left - right direction in

[0074] In one or more embodiments provided in this specification, the traction member 3 is wound around the first shaft 1 and the second shaft 2 in a ring shape.

[0075] In some embodiments, the first shaft 1 and the first gear 41, and the second shaft 2 and the second gear 42 can be connected by key transmission. In some embodiments, the first shaft 1 and the first gear 41, and the second shaft 2 and the second gear 42 are fixedly connected by fasteners arranged in the radial direction.

[0076] In some embodiments, a shaft keyway can be provided on the first shaft 1, a gear keyway is provided on the first gear 41, a key is arranged, a part of the key is located in the shaft keyway, and the other part of the key is located in the gear keyway. In some embodiments, the shaft keyway is a waist - shaped groove having at least two relatively arranged straight sides. Correspondingly, the gear keyway is a groove penetrating along the thickness direction of the first gear. Install the key into the gear keyway, adjust the first gear so that the gear keyway is aligned with the part of the key protruding from the gear keyway, and insert the first gear 41 into the first shaft 1, then the key can enter the gear keyway. The power of the first shaft 1 is transmitted to the first gear 41 through the key.

[0077] In some embodiments, a similar configuration is implemented for the second shaft 2 and the second gear 42, and the power of the second gear 42 is transmitted to the second shaft 2 through another key.

[0078] The specific power transmission route may be: motor → first shaft 1 → first gear 41 → transmission gear 43 → second gear 42 → second shaft 2.

[0079] In some embodiments, a threaded hole is also provided on the first shaft 1, and a gear fixing hole is provided in the radial direction of the first gear 41. The gear fixing hole penetrates from the side surface of the first gear 41 to the center of the first gear 41. A fastener, such as a threaded fastener, can penetrate the gear fixing hole and be connected to the threaded hole on the first shaft 1. In some embodiments, the gear fixing hole is a clearance hole, and in other embodiments, the gear fixing hole can also be a threaded hole.

[0080] In some embodiments, a similar configuration can be implemented for the second shaft and the second gear 42.

[0081] Among them, the key is mainly used to transmit power between the shaft and the gear, and the fastener is mainly used to limit the axial displacement of the first gear 41 and the second gear 42 on the first shaft 1 and the second shaft 2.

[0082] In one or more embodiments provided in this specification, refer to Figure 2 、 Figure 3 As shown, a plurality of first grooves 11 for the traction member to wind around are provided on the first shaft 1, and a plurality of second grooves 21 for the traction member to wind around are provided on the second shaft 2. In some embodiments, the number of the first grooves 11 is 1 less than the number of the second grooves 21. In some embodiments, the plurality of first grooves 11 are independent annular grooves, and the plurality of second grooves 21 are independent annular grooves. In some embodiments, the traction member 3 passes through one first groove 11 and winds around one second groove 21, then passes through another first groove 11, and then winds around another second groove 21.

[0083] In one or more embodiments provided in this specification, at least one of the first groove 11 and / or the second groove 21 has an inclined groove wall, and the groove wall is configured to make the width of the bottom of the groove (such as the first groove 11 and / or the second groove 21) smaller than the width of the opening of the groove.

[0084] In some embodiments, the cross-section of the first groove 11 and / or the second groove 21 is trapezoidal. The width of the upper base of the trapezoid is not greater than the diameter of the traction member, such as a steel cable. Taking a steel cable with a diameter of 8 cm as an example, the width of the upper base can be set to 5 - 8 cm. Specifically, the upper base can be set to 5.8 cm, 6.2 cm, 6.5 cm, 7 cm, 8 cm, etc. The width of the lower base of the trapezoid is less than the width of the upper base. Continuing with the previous example, the width of the lower base can be set to 2 - 4 cm. Specifically, the width of the lower base can be set to 2.5 cm, 3 cm, 3.5 cm, etc. To more intuitively understand the beneficial effects of setting the second groove 21 in this way, let's assume the diameter of the steel cable is 8 cm, the width of the upper base is 6.2 cm, and the width of the lower base is 3 cm. When used for the first time, although the diameter of the steel cable is greater than the width of the upper opening of the second groove 21, due to the certain deformation space of the steel cable, a part of the steel cable can be squeezed into the second groove 21 under pressure, so that the steel cable has a large contact area with the side wall of the second groove 21, generating a large frictional force. As the usage time extends, the steel cable is squeezed / worn and becomes thinner. Since the cross-section of the second groove 21 is wider at the top and narrower at the bottom, the steel cable will not completely fall into the second groove 21. At this time, under pressure, only part of the steel cable area is still squeezed into the second groove 21 and has a large contact area with the side wall of the second groove 21. It can be seen that such a groove structure enables the propulsion device to still stably drive the elevator of the thruster to lift or maintain it at a certain height even after being used for a certain period of time, has high reliability, and extends the service life of the device.

[0085] In some embodiments, in order to further increase the frictional force between the traction member, such as a steel cable, and the second shaft 2, anti-slip patterns can be provided on the side wall of the second groove 21. The anti-slip patterns can be formed on the side wall of the second groove 21 by means of corrosion, chiseling, cladding, etc. The anti-slip patterns can be irregular or regular.

[0086] In one or more embodiments provided in this specification, refer to Figure 10 As shown, both the first shaft 1 and the second shaft 2 include: a first section 51 arranged in sequence for supporting rotation and sealing, a second section 52 for engaging with the first gear 41 or the second gear 42, a third section 53 for the traction member 3 to wind around and abut against, and a fourth section 54 for supporting rotation and sealing.

[0087] In some embodiments, the diameter of the third section 53 is greater than the diameter of the second section 52. A stepped portion is formed between the second section 52 and the third section 53 for mounting and positioning the first gear 41 or the second gear 42. The first groove 11 or the second groove 21 is provided on the third section 53.

[0088] In some embodiments, stepped portions can also be formed between the first section 51 and the second section 52, and between the third section 53 and the fourth section 54.

[0089] In one or more embodiments provided in this specification, as shown in Figures 1 to 6 , the lifting device may include: a housing having two vertically arranged side plates 6, with a first shaft 1 and a second shaft 2 located between the two side plates 6; bearings 7 are provided between the first shaft 1 and the side plates 6, and between the second shaft 2 and the side plates 6. For example, bearings 7 are provided between one end or both ends of the first shaft 1 and the side plates 6. For example, bearings 7 are provided between one end or both ends of the second shaft 1 and the side plates 6. For example, at least one bearing 7 is provided between each end of the two ends of the first shaft 1 or the second shaft 2 and the side plates 6. In some embodiments, the bearings 7 are used to reduce the friction between the two ends of the first shaft 1 and the side plates 6, and between the two ends of the second shaft 2 and the side 6, ensuring that the second shaft 2 can rotate synchronously with the first shaft 1.

[0090] As shown in Figure 6 , in some embodiments, the bearing 7 may be a cylindrical ball bearing, which uses cylindrical rollers between the inner ring and the outer ring of the bearing, so that there is a large transmission area between the inner ring and the outer ring of the bearing, and it is not easy to deform due to tangential force.

[0091] As shown in Figure 11 、 Figure 12 , in some embodiments, a first oil seal 81 is provided on the first shaft 1 at the bearing 7, and a second oil seal 82 is provided on the second shaft 2 at the bearing 7. By arranging the oil seals, the first shaft 1, the second shaft 2, the first gear 41, and the second gear 42 are in a relatively sealed environment, which can delay or even prevent the erosion of the structure by a humid environment or seawater.

[0092] Specifically, a first oil seal 81 is provided at each end of the first shaft 1, and a second oil seal is provided at each end of the second shaft 2. Further, the two first oil seals 81 are located between the two bearings 7 on the first shaft 1, and the two second oil seals are located between the two bearings 7 on the second shaft 2. Specifically, the two first oil seals 81 are located inside the two bearings 7 on the first shaft 1 to prevent liquids such as seawater from entering between the two first oil seals 81 and eroding the first shaft 1 or the first gear 41, the transmission gear 43, etc.; the two second oil seals 82 are located inside the two bearings 7 on the second shaft 2 to prevent liquids such as seawater from entering between the two second oil seals 81 and eroding the second shaft 2 or the second gear 42, the transmission gear 43, etc. In some embodiments, a first oil seal 81 is provided at one end of the first shaft 1, and a second oil seal 82 is provided at one end of the second shaft 2. Since the other ends of the first shaft 1 and the second shaft 2 are in a relatively sealed space, oil seals may not be provided at their other ends.

[0093] In one or more embodiments provided in this specification, as shown in Figure 11 、 Figure 12 、 Figure 13As shown, the lifting device may further include: an oil seal cover 83, which is fixedly connected to the side plate 6. The oil seal cover 83 has: a first hole 831 through which the first shaft 1 passes; a first groove 832 for accommodating the first oil seal 81; a second hole 833 through which the second shaft 2 passes; a second groove 834 for accommodating the second oil seal; a third hole 836 for accommodating the transmission shaft 44, and a sealing strip groove 835 provided outside the first groove 831, the second groove 833, and the third hole 836; wherein, a sealing strip 9 for fitting with the side plate 6 is provided in the sealing strip groove. In some embodiments, the sealing strip 9 may be a sealing ring (such as an O-ring).

[0094] Specifically, one oil seal cover 83 is correspondingly arranged on each of the two side plates 6. In some embodiments, the transmission shaft 44 is fixed to one of the oil seal covers 83.

[0095] In some embodiments, the oil seal cover 83 is used to accommodate the oil seal. In other embodiments, the oil seal cover 83 may further be used to accommodate at least a part or all of the bearing, which provides support for the bearing and the oil seal, and provides a sealing surface with the oil seal. The curved surface sealing is further carried out by arranging the sealing strip 9 around the bearing and the oil seal.

[0096] Second Embodiment

[0097] In one or more embodiments provided in this specification, refer to Figure 14 、 Figure 15 As shown, a lifting device is provided, which can also achieve the transmission effect of "rotating shaft → traction member, driven shaft → traction member". Specifically, it includes: a first shaft 1, a second shaft 2, and a transmission mechanism connecting the first shaft 1 and the second shaft 2. The transmission mechanism is configured to make the second shaft 2 rotate synchronously with the first shaft 1; it further includes a traction member 3, and the traction member 3 is wound around the first shaft 1 and the second shaft 2; wherein, one of the first shaft 1 and the second shaft 2 is a driving shaft, and the other of the first shaft 1 and the second shaft 2 is a driven shaft.

[0098] The main structure of the second embodiment is similar to that of the first embodiment, so it will not be described in detail. In one or more embodiments of the second embodiment provided in this specification, the main difference from the first embodiment is that the transmission mechanism includes: a first gear 41 fixedly connected to the first shaft 1, a second gear 42 fixedly connected to the second shaft 2, and the first gear 41 meshes with the second gear 42; the rotation directions of the first shaft 1 and the second shaft 2 are opposite.

[0099] In some embodiments, the first shaft 1 and the first gear 41, and the second shaft 2 and the second gear 42 are connected by key transmission; the first shaft 1 and the first gear 41, and the second shaft 2 and the second gear 42 are fixedly connected by fasteners arranged in the radial direction.

[0100] See Figure 16 、 Figure 17 、 Figure 23 As shown, a shaft keyway 111 is provided on the first shaft 1, a gear keyway 112 is provided on the first gear 41, and a key 113 is arranged. A part of the key 113 is located in the shaft keyway 111, and another part of the key 113 is located in the gear keyway 112. In some embodiments, the shaft keyway 111 is a waist-shaped groove, which has at least two relatively arranged straight sides. Correspondingly, the gear keyway 112 is a groove that penetrates through the first gear 41 in its thickness direction. Install the key 113 into the gear keyway 112, adjust the first gear 41 so that the gear keyway 112 is aligned with the part of the key 113 protruding from the gear keyway 112, and insert the first gear 41 into the first shaft 1, then the key 113 can enter the gear keyway 112. The power of the first shaft 1 is transmitted to the first gear 41 through the key 113.

[0101] In some embodiments, a similar configuration is implemented for the second shaft 2 and the second gear 42, and the power of the second gear 42 is transmitted to the second shaft 2 through another key.

[0102] The specific power transmission route is: motor → first shaft 1 → first gear 41 → second gear 42 → second shaft 2.

[0103] See Figure 23 As shown, a threaded hole is also provided on the first shaft 1, and a gear fixing hole 114 is provided in the radial direction of the first gear 41. The gear fixing hole 114 penetrates from the side of the first gear 41 to the center of the first gear 41. A fastener, such as a threaded fastener, penetrates through the gear fixing hole 114 and is connected to the threaded hole on the first shaft 1. In some embodiments, the gear fixing hole 114 is a clearance hole, and in other embodiments, the gear fixing hole 114 can also be a threaded hole.

[0104] In some embodiments, a similar configuration is implemented for the second shaft and the second gear 42.

[0105] Among them, the key 113 is mainly used to transmit the power between the shaft and the gear, and the fastener is mainly used to limit the axial displacement of the first gear 41 and the second gear 42 on the first shaft 1 and the second shaft 2.

[0106] Continue to see Figures 16 to 18As shown, in one or more embodiments provided in this specification, a first groove 11 for a traction member to wind around is formed on a first shaft 1, and a plurality of second grooves 21 for the traction member to wind around are formed on a second shaft 2. In some embodiments, the plurality of second grooves 21 are independent annular grooves. In some embodiments, the second grooves 21 are formed along the circumferential direction of the first shaft. In some embodiments, the traction member 3 can pass through the first groove 11 and wind around one second groove 21, then pass through the first groove 11 again, and then wind around another second groove 21.

[0107] In some embodiments, the total width of the plurality of second grooves 21 in the axial direction of the second shaft 2 matches the width of the first groove 11 in the axial direction of the first shaft 1, such as being equal in width. In other embodiments, the total width of the plurality of second grooves 21 in the axial direction of the second shaft 2 can be less than the width of the first groove 11 in the axial direction of the first shaft 1.

[0108] Specifically, in some embodiments, the traction member 3, such as a steel cable, winds around a second groove 21 on one side and exits from a second groove 21 on the other side. Therefore, there is a part of the traction member 3 that is inclined relative to the cross-section of the first shaft 1 or a part that is inclined relative to the cross-section of the second shaft 2.

[0109] In some embodiments, the width of the first groove 11 is greater than or equal to the diameter of the traction member 3. In some embodiments, the width of the first groove 11 is greater than twice the diameter of the traction member 3. By setting the width of the first groove 11 to be greater than twice the diameter of the traction member 3, the inclined part of the traction member 3 can be mainly located at the first groove 11, and it is not easy to have running jams or jamming. In some embodiments, the inclined part of the traction member 3 can also slide adaptively within the first groove to cooperate with the position of the traction member 3 on the second groove 12. In some embodiments, the first groove 11 has a flat bottom to allow the traction member 3 to slide within the range of the first groove 11.

[0110] In one or more embodiments provided in this specification, the second groove 21 has at least one inclined groove wall, and the groove wall is configured to make the width of the bottom of the second groove 21 smaller than the width at the opening of the second groove 21. In some embodiments, the second groove 21 has two inclined groove walls. In one or more embodiments provided in this specification, the first groove 11 also has at least one inclined groove wall. In some embodiments, the first groove 11 has two inclined groove walls. Regarding the inclined arrangement of the groove walls, it is similar to the inclined arrangement of the groove walls in the first embodiment, so it will not be elaborated here.

[0111] In one or more embodiments provided in this specification, the first shaft 1 and the second shaft 2 may both include: a first section 51 arranged in sequence for supporting rotation and sealing, a second section 52 for engaging with the first gear 41 or the second gear 42, a third section 53 for the traction member 3 to wind around, and a fourth section 54 for supporting rotation and sealing. The diameter of the third section 53 is greater than that of the second section 52. A stepped portion is formed between the second section 52 and the third section 53 for mounting and positioning the first gear 41 or the second gear 42. In some embodiments, stepped portions may also be formed between the first section 51 and the second section 52, and between the third section 53 and the fourth section 54.

[0112] In one or more embodiments provided in this specification, refer to Figures 14 to 19 As shown, the lifting device includes: a housing, the housing has two vertically arranged side plates 6, and the first shaft 1 and the second shaft 2 are located between the two side plates 6; bearings 7 are provided between the first shaft 1 and the side plate 6, and between the second shaft 2 and the side plate 6. The bearings 7 are used to reduce the friction between the two ends of the first shaft 1 and the side plate 6, and between the two ends of the second shaft 2 and the side 6, and ensure that the second shaft 2 can rotate synchronously with the first shaft 1.

[0113] Refer to Figure 19 As shown, in some embodiments, the bearing 7 is a cylindrical ball bearing, and cylindrical rollers are used between the inner ring and the outer ring of the bearing, so that there is a large transmission area between the inner ring and the outer ring of the bearing, and it is not easy to deform due to tangential force.

[0114] In some embodiments, a first oil seal 81 is provided at the bearing 7 of the first shaft 1, and a second oil seal 82 is provided at the bearing 7 of the second shaft 2. By arranging the oil seals, the first shaft 1, the second shaft 2, the first gear 41, and the second gear 42 are in a relatively sealed environment, delaying or even preventing the erosion of the structure by a humid environment or seawater.

[0115] Specifically, a first oil seal 81 is provided at each end of the first shaft 1, and a second oil seal 82 is provided at each end of the second shaft 2. Further, the two first oil seals 81 are located between the two bearings 7 on the first shaft 1, and the two second oil seals 82 are located between the two bearings 7 on the second shaft 2.

[0116] In one or more embodiments provided in this specification, refer to Figure 25 、 Figure 26As shown in the figure, the lifting device includes: an oil seal cover 83, which is fixedly connected to the side plate 6. The oil seal cover 83 has: a first hole 831 through which the first shaft 1 passes; a first groove 832 for accommodating the first oil seal 81; a second hole 833 through which the second shaft 2 passes; a second groove 834 for accommodating the second oil seal 82; a sealing strip groove 835 provided outside the first groove 832 and the second groove 834; wherein, a sealing strip 9 for fitting with the side plate 6 is provided in the sealing strip groove 835.

[0117] Specifically, one oil seal cover 83 is correspondingly arranged on each of the two side plates 6.

[0118] The oil seal cover 83 is used to accommodate bearings and / or oil seals, which provides support for the bearings and / or oil seals and provides a sealing surface with the oil seals. Further surface sealing is carried out by arranging the sealing strip 9 around the bearings and oil seals.

[0119] In some embodiments, the cross-sections of both the first oil seal 81 and the second oil seal 82 are C-shaped.

[0120] See Figure 25 , in some embodiments, the first oil seal 81 and the second oil seal 82 may include: an inner ring portion 101 that fits with the first shaft 1 or the second shaft 2, an outer ring portion 102 that fits with the side wall of the first groove 832 or the side wall of the second groove 834, and a connecting portion 103 that connects the inner ring portion 101 and the outer ring portion 102, and the connecting portion 103 fits with the bottom of the first groove 832 or the bottom of the second groove 834.

[0121] In one or more embodiments provided in this specification, the bearing 7 protrudes from the side plate 6, and the oil seal cover 83 covers the first oil seal 81 and the second oil seal 82 and partially covers the bearing 7.

[0122] In one or more embodiments provided in this specification, see Figure 17 As shown in the figure, the second shaft 2 is located above the first shaft 1; the traction member 3 passes through the first side A of the first shaft 1 from bottom to top and winds around to the first side A of the second shaft 2, then extends downward from the second side B of the second shaft 2 and winds around to the first side A of the first shaft 1, and then extends upward from the second side B of the first shaft 1 and winds around to the first side A of the second shaft 2.

[0123] Among them, the first side A is one of the opposite sides of the lifting device (such as the front and back sides or the left and right sides), and the second side B is the other of the opposite sides of the lifting device. Among them, see Figure 17 As shown in the figure, the first side A refers to Figure 17 the front side in Figure 17 the back side in

[0124] In this embodiment, the first shaft 1 and the second shaft 2 are configured to rotate towards each other. By the above-mentioned winding method of the traction member 3, it is allowed that the traction member 3 is guided to rise or fall when the first shaft 1 and the second shaft 2 rotate towards each other.

[0125] Among them, the second shaft 2 is closer to the second side B than the first shaft 1. Refer to Figure 24 As shown, the positions of the first hole 831 and the second hole 833 are shown, that is, the positions of the first shaft 1 and the second shaft 2 are shown. Figure 24 It can be seen that there is a certain offset between the first shaft 1 and the second shaft 2 in the front-rear direction (that is, Figure 24 the up-down direction in

[0126] In one or more embodiments provided in this specification, the traction member 3 is wound around the first shaft 1 and the second shaft 2 in an 8-shaped manner. Based on the above 8-shaped winding method, the contact areas of the traction member 3 with the first shaft 1 and the second shaft 2 are both increased to improve the transmission efficiency. In this embodiment, when the first shaft 1 and the second shaft 2 rotate synchronously in reverse and the traction member 3 is wound around the first shaft 1 and the second shaft 2 in an 8-shaped manner, the contact surfaces of the traction member 3 with the first shaft 1 and the second shaft 2 are both larger than half of its outer peripheral surface. In some embodiments, the contact surfaces of the traction member 3 with the first shaft 1 and the second shaft 2 are almost close to its entire outer peripheral surface (determined according to the distance between the first shaft 1 and the second shaft 2).

[0127] Third Embodiment

[0128] Refer to Figures 27 to 29 As shown, a lifting device of an embodiment is shown. Its structure is similar to that of the lifting device in one or more embodiments of the first embodiment. The main difference is that the outer diameter of the first gear 41 is larger than the outer diameter of the first shaft 1, the outer diameter of the second gear 42 is larger than the outer diameter of the second shaft 2, and the transmission gear 43 is smaller and arranged between the first gear 41 and the second gear 42.

[0129] Fourth Embodiment

[0130] Refer to Figure 30 、 Figure 31 As shown, a propulsion device of an embodiment is shown. It includes a lifting device. The lifting device is based on the first embodiment, the second embodiment or the third embodiment. The traction member 3 of the lifting device is a steel cable, and the member to be towed is the lifting rod 100. Among them, the middle part of the traction member 3 is wound around the first shaft 1 and the second shaft 2, and the two ends of the traction member 3 are respectively fixedly connected to the two ends of the lifting rod 100.

[0131] In the propulsion device of one or more embodiments provided in this specification, a thruster 200 is provided on the lifting rod 100. The lifting device drives the traction member 3 to rise or fall based on the rotation of the first shaft 1 and the second shaft 2, and then drives the lifting rod 100 to rise or fall, thereby driving the thruster 200 to rise or fall. In some embodiments, the thruster 200 is a marine thruster, and the thruster 200 is configured to be able to rise out of the water or fall into the water. In some embodiments, a control mechanism 300 for controlling the thruster 200 or other mechanisms is further provided on the lifting rod 100.

[0132] The Fifth Embodiment

[0133] See Figures 32 to 35 As shown, a lifting device of an embodiment is shown. Based on the first embodiment, it can also achieve the transmission effect of "rotating shaft → traction member, driven shaft → traction member". Specifically, it includes: a first shaft 1, a second shaft 2, and a transmission mechanism connecting the first shaft 1 and the second shaft 2. The transmission mechanism is configured to make the second shaft 2 rotate synchronously with the first shaft 1; it further includes a traction member 3, and the traction member 3 is wound around the first shaft 1 and the second shaft 2; wherein, one of the first shaft 1 and the second shaft 2 is the driving shaft, and the other of the first shaft 1 and the second shaft 2 is the driven shaft.

[0134] The main structure of the fifth embodiment is similar to that of the first embodiment, so it will not be described in detail. In one or more embodiments of the fifth embodiment provided in this specification, the main difference from the first embodiment is that a transmission device is provided on each side of the first shaft 1 and the second shaft 2 of the lifting device. Exemplarily, in some embodiments, the lifting device may include: two first gears 41, two second gears 42, and two transmission gears 43. Among them, a first gear 41 is provided at each end of the first shaft 1, a second gear 42 is provided at each end of the second shaft 2, and each first gear 41 and a second gear 42 are meshed through a transmission gear 43. Through the two transmission devices arranged on both sides of the first shaft 1 and the second shaft 2, one of the first shaft 1 and the second shaft 2 can drive the other to rotate, and the effect of bilateral synchronous transmission is obtained, which can better transmit torque and avoid asynchronous torsion on both sides of the shaft.

[0135] In some embodiments, the connection structures of the first shaft 1 with the two first gears 41 and the second shaft 2 with the two second gears 42 are similar to those of the first embodiment, so they will not be described in detail. In some embodiments, the outer diameter of the first gear 41 may be equal to the outer diameter of the first shaft 1, and the outer diameter of the second gear 42 may be equal to the outer diameter of the second shaft 2, so as to provide a larger arrangement space for the transmission gear 43.

[0136] In some embodiments, the lifting device includes two fixedly arranged transmission shafts 44. Two transmission gears 43 are respectively rotatably connected to the two transmission shafts 44, and the transmission gears 43 are configured to be able to rotate on the transmission shafts 44. Exemplarily, the transmission shafts 44 have non-circular ends, and the fixation of the transmission shafts 44 and the prevention of the rotation of the transmission shafts 44 themselves are achieved through the cooperation of the non-circular ends of the transmission shafts 44 and the non-circular holes at the fixed positions of the transmission shafts. For example, the ends of the transmission shafts 44 are waist-shaped, rectangular, hexagonal, etc.

[0137] In some embodiments, similar to the first embodiment, gaskets can also be provided on one side and both sides of the transmission gear 43, and a coupling sleeve can also be provided between the transmission gear and the transmission shaft, which will not be elaborated here.

[0138] See Figure 34 As shown, in some embodiments, a first oil seal 81 is provided at each end of the first shaft 1, a second oil seal 82 is provided at each end of the second shaft 2, and an oil seal cover 83 is correspondingly arranged at each end of the first shaft 1 and the second shaft 2. In some embodiments, the fixed position of the transmission shaft 44 for fixing the transmission shaft can be located on the oil seal cover 83. In other words, the two transmission shafts 44 are respectively fixed to the two oil seal covers 83. In other embodiments, see Figure 35 As shown, the fixed position of the transmission shaft 44 for fixing the transmission shaft can also be located on the side plate 6, and the transmission shaft 44 can pass through the oil seal cover 83 and be fixed to the side plate 6.

[0139] In one or more embodiments of the fifth embodiment provided in this specification, a plurality of first grooves 11 for the traction member 3 to wind around are formed on the first shaft 1, and a plurality of second grooves 21 for the traction member to wind around are formed on the second shaft 2. Both the first grooves 11 and the second grooves 21 are arc-shaped. The arc-shaped side walls of the first grooves 11 and the second grooves 21 provide friction for the traction member 3, enabling the rotation of the first shaft 1 and the second shaft 2 to drive the movement of the traction member 3 based on the friction.

[0140] In some embodiments, a separating portion 400, such as an annular separating portion 400, is provided on the first shaft 1 and the second shaft 2. The separating portion 400 is provided between two adjacent first grooves 1 and between two adjacent second grooves 2. In other words, the first shaft 1 forms a plurality of first grooves 11 through one or more separating portions 400, and the second shaft 2 forms a plurality of second grooves 21 through one or more separating portions 400. In some embodiments, the separating portion 400 is used to hold the position of the traction member 3 in the first groove 11 or the position of the traction member 3 in the second groove 21. In some embodiments, when the traction member 3 is wound around the first shaft 1 or the second shaft 2, friction may occur between adjacent wound portions of the traction member 3, resulting in damage to the traction member 3 or jamming of the rotation of the first shaft 1 and the second shaft 2. The separating portion 400 can separate adjacent wound portions of the traction member 3 to avoid the aforementioned problems.

[0141] See Figure 34 、 35 As shown, in some embodiments, the separating portion 400 has two side walls in an arc shape, so that the first groove 11 and the second groove 21 are in an arc shape. In some embodiments, the separating portion 400 further has an outer edge in an arc shape.

[0142] In some embodiments, the outer diameter of the separating portion 400 of the first shaft 1 is smaller than the outer diameter of the first shaft 1, and the outer diameter of the separating portion 400 of the second shaft 2 is smaller than the outer diameter of the second shaft 2. The cooperation between the arc-shaped outer edge of the separating portion 400 and its smaller outer diameter allows the traction member 3 to slide from one first groove 11 to an adjacent or farther first groove 11 in some specific situations (for example, when there may be a relatively large Figure 34 、 Figure 35 displacement in the left-right direction during certain working states) or from one second groove 12 to an adjacent or farther second groove 21. At the same time, the larger outer diameter of the first shaft 1 and the larger outer diameter of the second shaft 2 limit the sliding of the traction member 3 within the range of the plurality of first grooves 11 or within the range of the plurality of second grooves 21, making it difficult for the portion of the traction member 3 wound around the first shaft 1 or the second shaft 2 to slide to other parts of the first shaft 1 or the second shaft 2.

[0143] Sixth Embodiment

[0144] The main structure of the sixth embodiment provided in this specification is similar to that of the first to fifth embodiments, so it will not be described in detail. In one or more embodiments of the sixth embodiment provided in this specification, the main difference from the first to fifth embodiments is that the first gear is integrally connected to the first shaft, and the second gear is integrally connected to the second shaft.

[0145] In some embodiments, a bar is provided as the first shaft or the second shaft, and one or more annular grooves are formed on the outer periphery of the bar to form the first groove or the second groove. The shape of the first groove or the second groove is similar to that of the first groove or the second groove in the first to fifth embodiments, so details are not described herein again. Further, a first gear or a second gear is machined at one end or both ends of the bar. Exemplarily, the bar can be clamped on a milling machine, and the bar is rotated and the contour and tooth shape of the gear are milled at one end of the bar by means of rotary cutting. Optionally, a gear can be formed at the other end of the bar. In other embodiments, the first gear or the second gear can also be integrally formed on the first shaft or the second shaft by means of disk cutting, hobbing, gear grinding or integral casting molding, etc.

[0146] It should be noted that the above-mentioned multiple embodiments can be combined with each other without conflict to obtain more embodiments.

[0147] The beneficial effects that the embodiments of this specification may bring include but are not limited to: (1) providing the first shaft 1 and the second shaft 2 that rotate synchronously so that both can provide power to the traction member 3 at the same time, preventing the traction member 3 from slipping relative to the second shaft; (2) realizing the synchronous forward rotation or synchronous reverse rotation of the first shaft 1 and the second shaft 2 through the transmission structure, and correspondingly setting the winding mode of the traction member 3 so that it has a better contact area with the first shaft 1 and the second shaft 2, providing a larger frictional force; (3) arranging bearings 7 so that the first shaft 1 and the second shaft 2 have better rotation conditions; (4) arranging oil seals to resist the erosion of moist air and seawater based on the dry working environment required by the gears; (5) in the scheme of the synchronous reverse rotation of the first shaft 1 and the second shaft 2, the annular winding mode of the traction member 3 can avoid the cross wear of the traction member 3 itself and extend the service life of the traction member 3; (6) in the scheme of the synchronous reverse rotation of the first shaft 1 and the second shaft 2, the figure-eight winding mode of the traction member 3 provides more contact area between the traction member 3 and the first shaft 1 and the second shaft 2, forming a better transmission effect and further preventing slipping.

[0148] It should be noted that the beneficial effects produced by different embodiments may be different. In different embodiments, the beneficial effects that may be produced can be any one or several combinations of the above, or any other beneficial effects that may be obtained. The above only lists the beneficial effects of some embodiments of this specification. The beneficial effects of more technical features of the embodiments of this specification can be found in the relevant descriptions of the corresponding embodiments, and will not be listed one by one here.

[0149] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is merely an example and does not constitute a limitation to this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are taught in this specification, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this specification.

Claims

1. A lifting device, characterized in that, Comprising: A first shaft, a second shaft, and a transmission mechanism connecting the first shaft and the second shaft, the transmission mechanism being configured to synchronize the rotation of the second shaft with the first shaft; A traction member wound around the first shaft and the second shaft, the traction member being configured to carry a towed member up or down based on the rotation of the first shaft and the second shaft; Wherein, one of the first shaft and the second shaft is a driving shaft, and the other of the first shaft and the second shaft is a driven shaft.

2. The lifting device according to claim 1, characterized in that, The transmission mechanism includes: a first gear fixedly connected to the first shaft, a second gear fixedly connected to the second shaft, and one or more transmission gears respectively meshing with the first gear and the second gear; The rotation directions of the first shaft and the second shaft are the same.

3. The lifting device according to claim 2, characterized in that, The transmission mechanism includes one such transmission gear: The transmission mechanism further includes: A fixedly arranged transmission shaft, the transmission gear being rotatably connected to the transmission shaft; Spacers provided on one or both sides of the transmission gear; A connecting sleeve provided between the transmission gear and the transmission shaft.

4. The lifting device according to claim 2, characterized in that, The second shaft is located above the first shaft; The traction member passes from bottom to top through the first side of the first shaft and winds around to the first side of the second shaft, then extends downward from the second side of the second shaft and winds around to the second side of the first shaft, and then extends upward from the first side of the first shaft and winds around to the first side of the second shaft; Wherein, the first side is one of the opposite sides of the lifting device, and the second side is the other of the opposite sides of the lifting device.

5. The lifting device according to claim 2, characterized in that, Between the first shaft and the first gear, and between the second shaft and the second gear, they are connected by key transmission, and between the first shaft and the first gear, and between the second shaft and the second gear, they are fixedly connected by fasteners arranged in the radial direction; or, The first shaft and the first gear are integrally formed, and the second shaft and the second gear are integrally formed.

6. The lifting device according to claim 2, wherein, Both ends of the first shaft and the second shaft are each provided with one such transmission mechanism.

7. The lifting device according to claim 6, wherein, A plurality of first grooves for the traction member to wind around are formed on the first shaft, and a plurality of second grooves for the traction member to wind around are formed on the second shaft; Both the first grooves and the second grooves are arc-shaped.

8. The lifting device according to claim 7, wherein, Partition portions are provided on the first shaft and the second shaft, and the partition portions are provided between two adjacent first grooves and between two adjacent second grooves; The outer diameter of the partition portion of the first shaft is smaller than the outer diameter of the first shaft, and the outer diameter of the partition portion of the second shaft is smaller than the outer diameter of the second shaft.

9. The lifting device according to claim 1, wherein The transmission mechanism includes: a first gear fixedly connected to the first shaft, a second gear fixedly connected to the second shaft, and the first gear meshes with the second gear; The rotation directions of the first shaft and the second shaft are opposite.

10. The lifting device according to claim 9, characterized in that, The second shaft is located above the first shaft; The traction member passes upwardly through the first side of the first shaft and abuts against the first side of the second shaft, then extends downwardly from the second side of the second shaft and abuts against the first side of the first shaft, and then extends upwardly from the second side of the first shaft and abuts against the first side of the second shaft; Wherein, the first side is one of the opposite sides of the lifting device, and the second side is the other of the opposite sides of the lifting device.

11. The lifting device according to claim 10, characterized in that, A first groove for the traction member to abut against is formed on the first shaft, and a plurality of second grooves for the traction member to abut against are formed on the second shaft; The total width of the plurality of second grooves in the axial direction of the second shaft matches the width of the first groove in the axial direction of the first shaft.

12. The lifting device according to claim 1, characterized in that, It includes: a housing, the housing has two vertically arranged side plates, and the first shaft and the second shaft are located between the two side plates; Bearings are provided between the first shaft and the side plates and between the second shaft and the side plates; A first oil seal is provided at the bearing of the first shaft, and / or a second oil seal is provided at the bearing of the second shaft; It further includes: an oil seal cover, the oil seal cover is fixedly connected to the side plate, and the oil seal cover has: a first hole for the first shaft to pass through, a first groove for accommodating the first oil seal, a second hole for the second shaft to pass through, a second groove for accommodating the second oil seal, and a sealing strip groove at least surrounding the outside of the first groove and the second groove; wherein, a sealing strip for fitting with the side plate is provided in the sealing strip groove; The bearing protrudes from the side plate, and the oil seal cover covers the first oil seal, the second oil seal, and partially covers the bearing.

13. The lifting device according to claim 1, characterized in that, The traction member includes a cable, the towed member includes a lifting rod, the middle of the cable is wound around the first shaft and the second shaft, and both ends of the cable are fixedly connected to both ends of the lifting rod.

14. A propulsion device, characterized in that, It includes the lifting device according to any one of claims 1-13, wherein the lifting device raises or lowers a lifting rod through the traction member, and a thruster is provided on the lifting rod.

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